Download 4d8a93526f9ad81

The Islamic University of Gaza
Midterm 1 cell biology
Faculty of science
Time: 1 hour
Biology Department
07- 10- 2013
------------------------------------------------------------------------------------------------------Answer the following questions:
I-
Choose the correct answer:
1.5 points
1- All the following are polymers except:
A – Carbohydrates
b- Proteins
c- Nucleic acids
d- lipids
2- Monosaccharides are classified according to:
A – The location of the carbonyl group (as aldose or ketose)
B – The number of carbons in the carbon skeleton
C- The structure and function of monosaccharides
D- A and B only
E- A and C only
3- All the following are present within the plant cell except:
a- cell wall
b- vacuole
c- cell membrane
II- Chick the correct answer and correct the wrong:
d- centerioles
1.5 points
1- { } The plant cell has two centerioles, each of which composed of nine
microtubule triplets.
2- { } Negative feedback means that as more of a product accumulates, the
process that creates it slows and less of the product is produced.
3- { } Humans store glycogen mainly in liver and muscle cells, and store the
fat in adipose cells.
III-
What are the different types of the cytoskeleton in eukaryotes and give
example to each?
1.5 points
1- The cytoskeleton type ------------------------ an example for it----------------------
2- The cytoskeleton type ------------------------ an example for it-----------------3- The cytoskeleton type ------------------------ an example for it----------------------
IV- What are the different types of cells of the connective tissue and point out to
their functions?
1 point
1- connective tissue cell ------------------------- Its function ---------------------------2- connective tissue cell -------------------------Its function ----------------------------
V- What are the different polymers of the carbohydrates and state the name of
their corresponding monomer?
2 points
1- Carbohydrate name ---------------------------- Its monomer name -----------------2- Carbohydrate name ----------------------------Its monomer name ------------------3- Carbohydrate name ----------------------------Its monomer name ------------------4- Carbohydrate name ----------------------------Its monomer name -------------------
VI- What are the names of the linkages which connect the following?
2 points
1- Two monosaccharides ---------------------------------------------------2- Two amino acids ---------------------------------------------------------3- Tow DNA nucleotides ----------------------------------------------------4- Glycerol and fatty acid -------------------------------------------------------------VII-
State the name of the interactions which are found in tertiary structure
protein.
1 point
VIII- compare between X-ray crystallography and nuclear magnetic resonance
(NMR) spectroscopy
1 point
IX- Draw only:
1- Connect glucose and fructose
2- Nicotinamide adenine dinucleotide
3- Four different RNA nucleotides in a single strand
3 points